21208365

素因数分解:

$3^3\times 5^1\times {\mathrm{127}}^1\times {\mathrm{1237}}^1$

素因数の和:1378

約数の個数: 32

約数和(自身を含む): 38031360

約数和(自身を除く): 16822995

約数列:

[1, 3, 5, 9, 15, 27, 45, 127, 135, 381, 635, 1143, 1237, 1905, 3429, 3711, 5715, 6185, 11133, 17145, 18555, 33399, 55665, 157099, 166995, 471297, 785495, 1413891, 2356485, 4241673, 7069455, 21208365]

約数ペア:

[(1, 21208365), (3, 7069455), (5, 4241673), (9, 2356485), (15, 1413891), (27, 785495), (45, 471297), (127, 166995), (135, 157099), (381, 55665), (635, 33399), (1143, 18555), (1237, 17145), (1905, 11133), (3429, 6185), (3711, 5715)]